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CASE REPORT
Antimitochondrial antibodies-positive myositis accompanied by cardiac involvement
  1. Tetsuo Yamanaka,
  2. Toru Fukatsu,
  3. Yoshimaro Ichinohe,
  4. Yasunobu Hirata
  1. Tokyo Teishin Byoin, Chiyoda-ku, Japan
  1. Correspondence to Dr Tetsuo Yamanaka, yamanaka_tetsuo{at}yahoo.co.jp

Summary

We report a 55-year-old man who experienced proximal muscle weakness accompanied by the atrial flutter (AFL) with 1:1 conduction. Detailed examination revealed elevated antimitochondrial antibodies (AMA) and creatine kinase (CK). AFL was converted to sinus rhythm by cardioversion. He was diagnosed as AMA-positive myositis-associated AFL and was treated by prednisolone. Although his muscle weakness and CK level improved, AFL with 1:1 conduction reappeared. Therefore, radiofrequency catheter ablation (RFCA) was needed to treat the AFL, resulting in maintenance of sinus rhythm. This case report describes cardiac involvement in a patient with AMA-positive myositis.

https://doi.org/10.1136/bcr-2016-218469

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    Footnotes

    • Contributors TY wrote the initial draft of the manuscript. TY, YI, TF and YH contributed to analysis and interpretation of data, and assisted in the preparation of the manuscript. All other authors have contributed to data collection and interpretation, and critically reviewed the manuscript. The final version of the manuscript was approved by all authors.

    • Competing interests None declared.

    • Patient consent Obtained.

    • Provenance and peer review Not commissioned; externally peer reviewed.